CN104638723A - Battery charging circuit and method thereof - Google Patents
Battery charging circuit and method thereof Download PDFInfo
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- CN104638723A CN104638723A CN201510051873.XA CN201510051873A CN104638723A CN 104638723 A CN104638723 A CN 104638723A CN 201510051873 A CN201510051873 A CN 201510051873A CN 104638723 A CN104638723 A CN 104638723A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Abstract
The invention provides a battery charging circuit, which simplifies the structure of a feedback control circuit in the traditional battery charging circuit, adopts a comparator to realize the difference value adjustment of a feedback signal and a reference signal, outputs the feedback control signal in a logic level form, realizes the automatic switching among various feedback control circuits, effectively avoids the occurrence of error switching and the simultaneous work of a plurality of feedback control circuits, and has better circuit portability. Meanwhile, the circuit structure is easier to integrate due to the adoption of a control mode of switching on or switching off with fixed time length.
Description
Technical field
The present invention relates to a kind of electronic circuit, more particularly, the present invention relates to a kind of battery charger and method thereof.
Background technology
Due to the variation of power supply and battery types, battery charger needs to control multiple variablees such as output voltage, output current, input voltage and input currents.Fig. 1 shows the electrical block diagram of the battery charger 10 of traditional employing BUCK circuit.Described battery charger 10 comprises multiple control loops such as output voltage, output current, input voltage and output current, and wherein each control loop comprises error amplifier and compensating network etc.During for output voltage control loop work, in each switch periods, clock signal clk set rest-set flip-flop, makes it output switch control signal PWM conducting pull-up power tube PM1, and drop-down power tube PM2 turns off simultaneously.Now electric current flows through inductance L 1 by input voltage vin end and is supplied to load RL, and charges to electric capacity Cout.Now the feedback signal Vx1 of output voltage Vout and sign output voltage Vout increases.Error amplifier A1 receiving feedback signals Vx1 and output voltage reference signal REF1, the error amplification signal Vcom1 of both output.When feedback signal Vx1 continues to increase, when making error amplification signal Vcom1 be less than peak signal PK, comparator CP outputs signal reset rest-set flip-flop FF0, makes it output pwm signal and turns off pull-up power tube PM1, drop-down power tube PM2 conducting simultaneously.Now, electric capacity Cout provides energy to load RL, and output voltage Vout declines.When clock signal clk again set rest-set flip-flop time, next switch periods starts.
In the battery charger shown in Fig. 1, each control loop all needs the error amplifier using high-precision high-speed, and each error amplifier needs different compensating networks to maintain the stable of loop, so that circuit is very complicated.Again because different circuit parameters needs different compensating networks, the portability of the battery charger shown in Fig. 1 is not strong.Between the signal value of the error amplification signal Vcom1 ~ Vcomn simultaneously exported due to each control loop relatively, switching between control loop may have problem, such as may there is the situation that multiple control loop works simultaneously, or loop handoff error etc.
Therefore, have and need to propose a kind of control loop simply, and loop easy switching, the portable strong battery charger of circuit.
Summary of the invention
Consider one or more technical problems of prior art, propose a kind of battery charger and control method thereof.
According to the embodiment of this technology, propose a kind of battery charger, comprising: master power switch; Multiple feedback control circuit, each feedback control circuit receives corresponding reference signal, controling parameters feedback signal and ramp signal, based on corresponding reference signal, controling parameters feedback signal and ramp signal, each feedback control circuit exports corresponding feedback control signal; Long circuit time fixing, exports fixing duration signal; And logical circuit, receive multiple feedback control signal and fixing duration signal, based on multiple feedback control signal and fixing duration signal, at output output switch control signal to control the operation of master power switch.
According to the embodiment of this technology, also proposed a kind of battery charger, comprising: master power switch; Output voltage feedback control circuit, comprise the first comparator, the first input end of described first comparator receives the superposed signal of output voltage feedback signal and ramp signal, second input receives output voltage reference signal, based on output voltage reference signal, ramp signal and output voltage feedback signal, described first comparator exports output voltage feedback control signal at output; Output current feedback control circuit, comprise the second comparator, the first input end of described second comparator receives the superposed signal of output current feedback signal and ramp signal, second input receives output current reference signal, based on output current reference signal, ramp signal and output current feedback signal, described second comparator exports output current feedback control signal at output; Input voltage feedback control circuit, comprise the 3rd comparator, the first input end of described 3rd comparator receives the difference signal of input voltage feedback signal and ramp signal, second input receives input voltage reference signal, based on input voltage reference signal, ramp signal and input voltage feedback signal, described 3rd comparator is in output output-input voltage feedback control signal; Input current feedback control circuit, comprise the 4th comparator, the first input end of described 4th comparator receives the superposed signal of input current feedback signal and ramp signal, second input receives input current reference signal, based on input current reference signal, ramp signal and input current feedback signal, described 4th comparator exports input current feedback control signal at output; Long circuit time fixing, exports fixing duration signal, described fixing duration signal each switch periods from master power switch turns off after one section of default fixing duration output pulse signal; And logical circuit, receive output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, based on output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, control the operation of master power switch at output output switch control signal.
According to the embodiment of this technology, also proposed a kind of battery charger, comprising: master power switch; Output voltage feedback control circuit, comprise the first comparator, the first input end of described first comparator receives the difference signal of output voltage feedback signal and ramp signal, second input receives output voltage reference signal, based on output voltage reference signal, ramp signal and output voltage feedback signal, described first comparator exports output voltage feedback control signal at output; Output current feedback control circuit, comprise the second comparator, the first input end of described second comparator receives the difference signal of output current feedback signal and ramp signal, second input receives output current reference signal, based on output current reference signal, ramp signal and output current feedback signal, described second comparator exports output current feedback control signal at output; Input voltage feedback control circuit, comprise the 3rd comparator, the first input end of described 3rd comparator receives the superposed signal of input voltage feedback signal and ramp signal, second input receives input voltage reference signal, based on input voltage reference signal, ramp signal and input voltage feedback signal, described 3rd comparator is in output output-input voltage feedback control signal; Input current feedback control circuit, comprise the 4th comparator, the first input end of described 4th comparator receives the difference signal of input current feedback signal and ramp signal, second input receives input current reference signal, based on input current reference signal, ramp signal and input current feedback signal, described 4th comparator exports input current feedback control signal at output; Long circuit time fixing, exports fixing duration signal, described fixing duration signal each switch periods from master power switch conducting after one section of default fixing duration output pulse signal; And logical circuit, receive output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, based on output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, control the operation of master power switch at output output switch control signal.
According to the embodiment of this technology, also proposed a kind of control method of battery charger, described battery charger comprises master power switch, comprise: adopt multiple feedback control circuit to receive multiple reference signal, multiple controling parameters feedback signal and ramp signal, and each feedback control circuit generates corresponding feedback control signal based on corresponding reference signal, corresponding controling parameters feedback signal and ramp signal; When adopting fixing, long circuit exports fixing duration signal; And select the break-make of master power switch described in multiple feedback control signal feedback control signal and fixing duration signal co-controlling.
The battery charger provided according to the above-mentioned each side of the present invention and control method thereof, control loop is simple, loop easy switching, without the need to using the error amplifier of high-precision high-speed, not only there is good portability, and be easy to mutually integrated with the analog circuit of high frequency after low-frequency channel digitlization, the optimization of realizing circuit.
Accompanying drawing explanation
For a better understanding of the present invention, will describe the present invention according to the following drawings:
Fig. 1 shows the electrical block diagram of the battery charger 10 of traditional employing BUCK circuit;
Fig. 2 shows the electrical block diagram of battery charger 20 according to an embodiment of the invention;
Fig. 3 shows the electrical block diagram of battery charger 30 according to an embodiment of the invention;
Fig. 4 shows the electrical block diagram of battery charger 30 according to an embodiment of the invention;
Fig. 5 shows the electrical block diagram of battery charger 40 according to an embodiment of the invention;
The signal waveform schematic diagram of output voltage feedback control circuit when Fig. 6 battery charger 40 shown in Fig. 5 works in stable state;
Fig. 7 shows the electrical block diagram of battery charger 50 according to an embodiment of the invention;
Each signal waveform schematic diagram of output voltage feedback control circuit when Fig. 8 battery charger 50 shown in Fig. 7 works in stable state;
Fig. 9 shows the electrical block diagram of battery charger 60 according to an embodiment of the invention;
Figure 10 shows the signal waveform schematic diagram of a certain feedback control circuit in battery charger 60;
Figure 11 shows the control method 70 of battery charger according to an embodiment of the invention.
Embodiment
To specific embodiments of the invention be described in detail below, it should be noted that the embodiments described herein is only for illustrating, is not limited to the present invention.In the following description, in order to provide thorough understanding of the present invention, a large amount of specific detail has been set forth.But, those of ordinary skill in the art be it is evident that: these specific detail need not be adopted to carry out the present invention.In other instances, in order to avoid obscuring the present invention, do not specifically describe known circuit, material or method.
In whole specification, " embodiment ", " embodiment ", " example " or mentioning of " example " are meaned: the special characteristic, structure or the characteristic that describe in conjunction with this embodiment or example are at least one embodiment of the invention involved.Therefore, the phrase " in one embodiment " occurred in each place of whole specification, " in an embodiment ", " example " or " example " differ to establish a capital and refer to same embodiment or example.In addition, can with any suitable combination and/or sub-portfolio by specific feature, structure or property combination in one or more embodiment or example.In addition, it should be understood by one skilled in the art that the accompanying drawing provided at this is all for illustrative purposes, and accompanying drawing is not necessarily drawn in proportion.Should be appreciated that when claim element " be connected to " or " being couple to " another element time, it can be directly connected or coupled to another element or can there is intermediary element.On the contrary, when claim element " be directly connected to " or " being directly coupled to " another element time, there is not intermediary element.Identical Reference numeral indicates identical element.Term "and/or" used herein comprises any and all combinations of one or more relevant project listed.
Fig. 2 shows the electrical block diagram of battery charger 20 according to an embodiment of the invention.As shown in Figure 2, battery charger 20 comprises: master power switch PM1; Multiple feedback control circuit LOOP1 ~ LOOPn, each feedback control circuit receives corresponding reference signal REFi, controling parameters feedback signal FBi and ramp signal Ramp, based on corresponding reference signal REFi, controling parameters feedback signal FBi and ramp signal Ramp, each feedback control circuit exports corresponding feedback control signal Vcomi, wherein n be greater than 1 integer, 1<i<n; Long circuit COT time fixing, exports fixing duration signal Tcon; And logical circuit LG0, receive multiple feedback control signal Vcom1 ~ Vcomn and fixing duration signal Tcon, based on multiple feedback control signal Vcom1 ~ Vcomn and fixing duration signal Tcon, at output output switch control signal PWM to control the operation of master power switch PM1.
Fig. 3 shows the electrical block diagram of battery charger 30 according to an embodiment of the invention.As shown in Figure 3, battery charger 30 comprises: master power switch (the first power switch) PM1; First feedback control circuit ~ the 4th feedback control circuit, each feedback control circuit receives corresponding reference signal REF1 ~ REF4, controling parameters feedback signal FB1 ~ FB4 and ramp signal Ramp, based on corresponding reference signal REF1 ~ REF4, controling parameters feedback signal FB1 ~ FB4 and ramp signal Ramp, each feedback control circuit exports corresponding feedback control signal Vcom1 ~ Vcom4; Long circuit COT time fixing, exports fixing duration signal Tcon; And logical circuit LG1, receive multiple feedback control signal Vcom1 ~ Vcom4 and fixing duration signal Tcon, based on multiple feedback control signal Vcom1 ~ Vcom4 and fixing duration signal Tcon, described logical circuit LG1 at output output switch control signal PWM to control the operation of master power switch PM1.
In the embodiment shown in fig. 3, battery charger 30 adopts BUCK circuit as its power output circuit.Those of ordinary skill in the art it should be understood that disclosed battery charger also can adopt the circuit of other suitable topological form as its power output circuit.In one embodiment, battery charger 30 also comprises: the second power switch PM2, and master power switch PM1 is coupled in series in input voltage vin and with reference between ground, described master power switch PM1 and the second power switch PM2 in turn conducting exports the energy of load (battery) to control; Inductance L 1, between the tie point being coupled in master power switch PM1 and the second power switch PM2 and output voltage Vout; Output capacitance Cout, is coupled between output voltage Vout and reference ground.
Battery charger 30 shown in Fig. 3 adopts four feedback control circuits to be that example is described, and those of ordinary skill in the art it should be understood that disclosed battery charger can adopt the feedback control circuit of any number being no less than.
In one embodiment, first feedback control circuit is output voltage feedback control circuit, comprise: feedback circuit OP1, there is first input end, the second input and output, described first input end receives the feedback signal FB1 of the output voltage Vout (cell voltage) of characterizing battery charging circuit 30, second input receives ramp signal Ramp, based on output voltage feedback signal FB1 and ramp signal Ramp, described feedback circuit OP1 is at output output feedack operation result FR1; And comparator CP1, there is first input end (normal phase input end), the second input (inverting input) and output, described first input end is coupled to feedback circuit OP1 and receives feedback op result FR1, described second input receives corresponding reference signal REF1, based on corresponding reference signal REF1 and feedback op result FR1, described comparator CP1 exports corresponding output voltage feedback control signal Vcom1 at output.In one embodiment, described feedback op result FR1 is the superposed signal of output voltage feedback signal FB1 and ramp signal Ramp.
In one embodiment, second feedback control circuit is output current feedback control circuit, comprise: feedback circuit OP2, there is first input end, the second input and output, described first input end receives the feedback signal FB2 of the output current (battery charge) of characterizing battery charging circuit 30, second input receives ramp signal Ramp, based on output current feedback signal FB2 and ramp signal Ramp, described feedback circuit OP2 is at output output feedack operation result FR2; And comparator CP2, there is first input end (normal phase input end), the second input (inverting input) and output, described first input end is coupled to feedback circuit OP2 and receives feedback op result FR2, described second input receives corresponding reference signal REF2, based on corresponding reference signal REF2 and feedback op result FR2, described comparator CP2 exports corresponding output current feedback control signal Vcom2 at output.In one embodiment, described feedback op result FR2 is the superposed signal of output current feedback signal FB2 and ramp signal Ramp.
In one embodiment, 3rd feedback control circuit is input voltage feedback control circuit, comprise: feedback circuit OP3, there is first input end, the second input and output, described first input end receives the feedback signal FB3 of the input voltage vin of characterizing battery charging circuit 30, second input receives ramp signal Ramp, and based on input voltage feedback signal FB3 and ramp signal Ramp, described feedback circuit OP3 is at output output feedack operation result FR3; And comparator CP3, there is first input end (inverting input), the second input (normal phase input end) and output, described first input end is coupled to feedback circuit OP3 and receives feedback op result FR3, described second input receives corresponding reference signal REF3, based on corresponding reference signal REF3 and feedback op result FR3, described comparator CP3 exports corresponding input voltage feedback control signal Vcom3 at output.In one embodiment, described feedback op result FR3 is the difference signal of input voltage feedback signal FB3 and ramp signal Ramp.
In one embodiment, 4th feedback control circuit is input current feedback control circuit, comprise: feedback circuit OP4, there is first input end, the second input and output, described first input end receives the feedback signal FB4 of the input current of characterizing battery charging circuit 30, second input receives ramp signal Ramp, and based on input current feedback signal FB4 and ramp signal Ramp, described feedback circuit OP4 is at output output feedack operation result FR4; And comparator CP4, there is first input end (normal phase input end), the second input (inverting input) and output, described first input end is coupled to feedback circuit OP4 and receives feedback op result FR4, described second input receives corresponding reference signal REF4, based on corresponding reference signal REF4 and feedback op result FR4, described comparator CP4 exports corresponding input current feedback control signal Vcom4 at output.In one embodiment, described feedback op result FR4 is the superposed signal of input current feedback signal FB4 and ramp signal Ramp.
In one embodiment, described fixing time long circuit COT comprise fixing duration breaking circuit, namely its fixing duration signal Tcon exported is in each switch periods, after the master power switch PM1 of battery charger turns off one section of default fixing duration, exports a pulse signal.Fixing duration breaking circuit is general knowledge known in this field, does not launch to describe at this.
In one embodiment, described logical circuit LG1 comprises: OR circuit OR1, there is four inputs and output, described four inputs are coupled to four feedback control circuits respectively and receive feedback control signal Vcom1 ~ Vcom4, based on feedback control signal Vcom1 ~ Vcom4, described output exports reset signal Rt; And rest-set flip-flop FF1, there is set end " S ", reset terminal " R " and output Q, when described set end " S " is coupled to fixing, long circuit COT receives fixing duration signal Tcon, the output that described reset terminal " R " is coupled to OR circuit OR1 receives reset signal Rt, based on fixing duration signal Tcon and reset signal Rt, described output output switch control signal PWM.
Each signal waveform schematic diagram of output voltage feedback control circuit when Fig. 4 battery charger 30 shown in Fig. 3 works.The operation principle of battery charger 30 is set forth below in conjunction with Fig. 3 and Fig. 4.Battery charger 30, by the break-make of control first power switch PM1 and the second power switch PM2, controls the energy passing to load (battery), is described below for during output voltage feedback control circuit steady operation.In the t0 moment, fixing duration signal Tcon set rest-set flip-flop FF1, then switch controlling signal PWM conducting master power switch PM1.Now, ramp signal Ramp starts to increase with fixed slope.In the t1 moment, the value of the superposed signal of output voltage feedback signal FB1 and ramp signal Ramp reaches the value of output voltage reference signal REF1, and the first comparator CP1 overturns, output feedback ontrol signal Vcom1.Feedback control signal Vcom1 is by OR circuit OR1 as reset signal Rt reset rest-set flip-flop FF1, then switch controlling signal PWM turns off master power switch PM1.The value of ramp signal Ramp falls after rise simultaneously.When after one section of default fixing duration, in the t2 moment, fixing duration signal Tcon set rest-set flip-flop FF1 again, next switch periods starts, and repeats said process again.
Above-mentioned is the course of work of output voltage feedback control circuit.In battery charger 30, the course of work of described output current feedback control circuit, input voltage feedback control circuit and input current feedback control circuit and the course of work of output voltage feedback control circuit similar, herein no longer launch describe.
Those of ordinary skill in the art it should be understood that the characteristic due to battery charger, and wherein during a road feedback control circuit job, the feedback control signal that other several roads feedback control circuits export is in disarmed state.In circuit as shown in Figure 2, when output voltage feedback control circuit works, namely battery charger is in the constant voltage charge state of charging to load (battery), now the value of other feedback signal FB2 ~ FB4 is less, feedback control signal Vcom2 ~ Vcom4 is in low level state, does not namely have an impact to OR circuit.
Feedback control signal Vcom1 ~ Vcomn due to the battery charger 30 shown in Fig. 3 is the low and high level signal that comparator exports, so can automatically switch between each feedback control circuit, and there will not be the situation that handoff error or multiple feedback control circuit work simultaneously.Namely once there be the comparator of any one feedback control circuit to overturn, then the feedback control signal that exports of this feedback control circuit is by OR circuit OR1 reset rest-set flip-flop FF1, and output switch control signal PWM turns off master power switch.Meanwhile, ramp signal Ramp declines while rest-set flip-flop FF1 is reset, until start when rest-set flip-flop FF1 is set again to rise with certain slope again.That is, in battery charger 30, once the work having a road feedback control circuit control logic circuit, the feedback control circuit on other roads can not affect logical circuit again, multiple feedback control circuit can not be there is like that work simultaneously by battery charger 10 as shown in Figure 1, or the situation of handoff error.
Simultaneously, battery charger 30 shown in Fig. 3 neither needs the clock that frequency is higher, do not need the baroque high-precision high-speed error amplifier circuit of compensating network, be easy to integrated and optimize overall circuit performance with the analog circuit of high frequency after low-frequency channel digitlization yet.Further, the compensating network changed because battery charger 30 does not need system for tracking parameter, battery charger 30 has better portability.
Each feedback control circuit shown in Fig. 3 adopts same ramp signal Ramp.Those of ordinary skill in the art it should be understood that each feedback control circuit can adopt homophase but the ramp signal of different amplitude.That is, in other embodiments, the ramp signal of each feedback control circuit can adopt same ramp signal to be multiplied by different coefficient generations according to different needs.
Fig. 5 shows the electrical block diagram of battery charger 40 according to an embodiment of the invention.Compared to the battery charger 30 shown in Fig. 3, battery charger more than 40 error correction signal Ve1 ~ Ve4 corrects reference signal REF1 ~ REF4 respectively.The signal waveform schematic diagram of output voltage feedback control circuit when Fig. 6 battery charger 40 shown in Fig. 5 works in stable state.As shown in Figure 6, in output voltage feedback control circuit, the superposed signal of what one end of comparator CP1 received is output voltage feedback signal FB1 and ramp signal Ramp, that the other end receives is output voltage reference signal REF1.Therefore, there is error between output voltage feedback signal FB1 and output voltage reference signal REF1, i.e. the value of ramp signal Ramp.Same, in input voltage feedback control circuit, the input voltage feedback signal FB3 of one end reception of comparator CP3 and the difference signal of ramp signal Ramp, that the other end receives is input voltage reference signal REF3.Therefore, also there is the error equaling the value of ramp signal Ramp between input voltage feedback signal FB3 and input voltage reference signal REF3.In order to compensate this error, error correction signal Ve1 ~ Ve4 is introduced in the feedback control circuit of battery charger 40, adopt benchmark computing circuit OP5 ~ OP8 respectively, reference signal REF1 ~ REF4 is corrected (or be added or subtract each other), generate benchmark operation result FR5 ~ FR8, to offset the impact that ramp signal brings.Battery charger 40 and battery charger 30 have similar operation principle, no longer repeat to set forth herein.
Those of ordinary skill in the art it should be understood that this error correction signal Ve1 ~ Ve4 can by drawing the mathematic interpolation of the feedback signal in the front switch cycle and reference signal.Error amplifier (without the need to high-precision high-speed) such as can be adopted to receive feedback signal and the reference signal of each feedback control circuit respectively, export error signal between the two and obtain.Error correction signal be retrieved as general knowledge known in this field, herein no longer launch describe.
Fig. 7 shows the electrical block diagram of battery charger 50 according to an embodiment of the invention.As shown in Figure 7, battery charger 50 comprises: master power switch (the first power switch) PM1; First feedback control circuit ~ the 4th feedback control circuit, each feedback control circuit receives corresponding reference signal REF1 ~ REF4, controling parameters feedback signal FB1 ~ FB4 and ramp signal Ramp, based on corresponding reference signal REF1 ~ REF4, controling parameters feedback signal FB1 ~ FB4 and ramp signal Ramp, each feedback control circuit exports corresponding feedback control signal Vcom1 ~ Vcom4; Long circuit COT time fixing, exports fixing duration signal Tcon; And logical circuit LG1, more than 2 feedback control signal Vcom1 ~ Vcom4 and fixing duration signal Tcon, based on multiple feedback control signal Vcom1 ~ Vcom4 and fixing duration signal Tcon, described logical circuit LG2 at output output switch control signal PWM to control the operation of master power switch PM1.
In one embodiment, first feedback control circuit is output voltage feedback control circuit, comprise: feedback circuit OP1, there is first input end, the second input and output, described first input end receives the feedback signal FB1 of the output voltage Vout (cell voltage) of characterizing battery charging circuit 50, second input receives ramp signal Ramp, based on output voltage feedback signal FB1 and ramp signal Ramp, described feedback circuit OP1 is at output output feedack operation result FR1; And comparator CP1, there is first input end (inverting input), the second input (normal phase input end) and output, described first input end is coupled to feedback circuit OP1 and receives feedback op result FR1, described second input receives corresponding reference signal REF1, based on corresponding reference signal REF1 and feedback op result FR1, described comparator CP1 exports corresponding output voltage feedback control signal Vcom1 at output.In one embodiment, described feedback op result FR1 is the difference signal of output voltage feedback signal FB1 and ramp signal Ramp.
In one embodiment, second feedback control circuit is output current feedback control circuit, comprise: feedback circuit OP2, there is first input end, the second input and output, described first input end receives the feedback signal FB2 of the output current (battery charge) of characterizing battery charging circuit 50, second input receives ramp signal Ramp, based on output current feedback signal FB2 and ramp signal Ramp, described feedback circuit OP2 is at output output feedack operation result FR2; And comparator CP2, there is first input end (inverting input), the second input (normal phase input end) and output, described first input end is coupled to feedback circuit OP2 and receives feedback op result FR2, described second input receives corresponding reference signal REF2, based on corresponding reference signal REF2 and feedback op result FR2, described comparator CP2 exports corresponding output current feedback control signal Vcom2 at output.In one embodiment, described feedback op result FR2 is the difference signal of output current feedback signal FB2 and ramp signal Ramp.
In one embodiment, 3rd feedback control circuit is input voltage feedback control circuit, comprise: feedback circuit OP3, there is first input end, the second input and output, described first input end receives the feedback signal FB3 of the input voltage vin of characterizing battery charging circuit 50, second input receives ramp signal Ramp, and based on input voltage feedback signal FB3 and ramp signal Ramp, described feedback circuit OP3 is at output output feedack operation result FR3; And comparator CP3, there is first input end (normal phase input end), the second input (inverting input) and output, described first input end is coupled to feedback circuit OP3 and receives feedback op result FR3, described second input receives corresponding reference signal REF3, based on corresponding reference signal REF3 and feedback op result FR3, described comparator CP3 exports corresponding input voltage feedback control signal Vcom3 at output.In one embodiment, described feedback op result FR3 is the superposed signal of input voltage feedback signal FB3 and ramp signal Ramp.
In one embodiment, 4th feedback control circuit is input current feedback control circuit, comprise: feedback circuit OP4, there is first input end, the second input and output, described first input end receives the feedback signal FB4 of the input current of characterizing battery charging circuit 50, second input receives ramp signal Ramp, and based on input current feedback signal FB4 and ramp signal Ramp, described feedback circuit OP4 is at output output feedack operation result FR4; And comparator CP4, there is first input end (inverting input), the second input (normal phase input end) and output, described first input end is coupled to feedback circuit OP4 and receives feedback op result FR4, described second input receives corresponding reference signal REF4, based on corresponding reference signal REF4 and feedback op result FR4, described comparator CP4 exports corresponding input current feedback control signal Vcom4 at output.In one embodiment, described feedback op result FR4 is the difference signal of input current feedback signal FB4 and ramp signal Ramp.
In one embodiment, during battery charger 50 fixing, long circuit COT comprises fixing duration turning circuit, namely its fixing duration signal Tcon exported is after the fixing duration that the master power switch PM1 conducting one section of battery charger is default, exports a pulse signal.Fixing duration turning circuit is general knowledge known in this field, does not launch to describe at this.
In one embodiment, logical circuit LG2 comprises: AND circuit AND1, there is four inputs and output, described four inputs are coupled to four feedback control circuits respectively and receive feedback control signal Vcom1 ~ Vcom4, based on feedback control signal Vcom1 ~ Vcom4, described output exports asserts signal St; And rest-set flip-flop FF1, there is set end " S ", reset terminal " R " and output " Q ", the output that described set end " S " is coupled to AND circuit AND1 receives asserts signal St, when described reset terminal " R " is coupled to fixing, long circuit COT receives fixing duration signal Tcon, based on fixing duration signal Tcon and asserts signal St, described output " Q " output switch control signal PWM.
Each signal waveform schematic diagram of output voltage feedback control circuit when Fig. 8 battery charger 50 shown in Fig. 7 works in stable state.The operation principle of battery charger 50 is set forth below in conjunction with Fig. 7 and Fig. 8.Be described for during output voltage feedback control circuit steady operation equally.In the t0 moment, fixing duration signal Tcon reset rest-set flip-flop FF1, then switch controlling signal PWM turns off master power switch PM1.Now, ramp signal Ramp starts to increase with fixed slope.In the t1 moment, the value of the superposed signal of the ramp signal Ramp of output voltage reference signal REF1 and oppositely growth reaches the value of output voltage feedback signal FB1, and the first comparator CP1 overturns, output feedback ontrol signal Vcom1.Feedback control signal Vcom1 is by AND circuit AND1 as asserts signal St set rest-set flip-flop FF1, then switch controlling signal PWM turns off master power switch PM1.Now the value of ramp signal Ramp falls after rise.When after one section of default fixing duration, in the t2 moment, fixing duration signal Tcon reset rest-set flip-flop FF1 again, next switch periods starts, and repeats said process again.
Above-mentioned is the course of work of output voltage feedback control circuit.In battery charger 50, the course of work of described output current feedback control circuit, input voltage feedback control circuit and input current feedback control circuit and the course of work of output voltage feedback control circuit similar, herein no longer launch describe.
Those of ordinary skill in the art it will be appreciated that, in the circuit shown in Fig. 7, when output voltage feedback control circuit works, namely battery charger is in the constant voltage charge state of charging to load (battery), now the value of other feedback signal FB2 ~ FB4 is less, feedback control signal Vcom2 ~ Vcom4 is in high level state, does not namely have an impact to AND circuit AND1.
Fig. 9 shows the electrical block diagram of battery charger 60 according to an embodiment of the invention.Compared to the battery charger 50 shown in Fig. 7, battery charger more than 60 error correction signal Ve1 ~ Ve4 corrects reference signal REF1 ~ REF4 respectively.Figure 10 shows the signal waveform schematic diagram of a certain feedback control circuit in battery charger 60.Due in feedback control circuit, the superposed signal of what one end of comparator CP1 received is output voltage reference signal REF1 and ramp signal Ramp, that the other end receives is output voltage feedback signal FB1, therefore, error is there is, i.e. the value of ramp signal Ramp between output voltage feedback signal FB1 and output voltage reference signal REF1.Same, in input voltage feedback control circuit, the input voltage feedback signal FB3 of one end reception of comparator CP3 and the difference signal of ramp signal Ramp, that the other end receives is input voltage reference signal REF3.Therefore, also there is the error equaling the value of ramp signal Ramp between input voltage feedback signal FB3 and input voltage reference signal REF3.In order to compensate this error, error correction signal Ve1 ~ Ve4 is introduced in the feedback control circuit of battery charger 60, adopt benchmark computing circuit OP5 ~ OP8 respectively, reference signal REF1 ~ REF4 is corrected (or be added or subtract each other), generate benchmark operation result FR5 ~ FR8, to offset the impact that ramp signal brings.Battery charger 60 and battery charger 50 have similar operation principle, no longer repeat to set forth herein.
Battery charger 30 ~ 60 shows electrical block diagram output voltage, output current, input voltage and input current four feedback signals being carried out to loop control.Required feedback signal in accordance with prompting of the present invention, according to application demand, can be added feedback control circuit to realize flexible and changeable application scheme by those of ordinary skill in the art.
Figure 11 shows the control method 70 of battery charger according to an embodiment of the invention.Described control method can be used for the battery charger controlling to comprise master power switch foregoing.As shown in figure 11, described control method 70 comprises: step 701, adopt multiple feedback control circuit to receive multiple reference signal, multiple controling parameters feedback signal and ramp signal, and each feedback control circuit generate corresponding feedback control signal based on corresponding reference signal, corresponding controling parameters feedback signal and ramp signal; Step 702, when adopting fixing, long circuit exports fixing duration signal; And step 703, select the break-make of master power switch described in multiple feedback control signal feedback control signal and fixing duration signal co-controlling.
In one embodiment, described step 701 comprises: carry out computing to corresponding controling parameters feedback signal and ramp signal and obtain feedback op result; And feedback op result is generated corresponding feedback control signal compared with mutually corresponding reference signal.
In one embodiment, computing is carried out to corresponding controling parameters feedback signal and ramp signal and comprise superposition and subtraction.
In one embodiment, described fixing duration signal comprises fixing duration Continuity signal.
In one embodiment, described fixing duration signal comprises fixing duration cut-off signals.
In one embodiment, described reference signal, through the error correction of error correction signal, comprises and corresponding error correction signal is superimposed to corresponding reference signal or deducts corresponding error correction signal from corresponding reference signal.
Battery charger provided by the invention and control method control loop simple, loop easy switching, without the need to using the error amplifier of high-precision high-speed, not only there is good portability, and be easy to mutually integrated with the analog circuit of high frequency after low-frequency channel digitlization, the optimization of realizing circuit.
Although exemplary embodiment describe the present invention with reference to several, should be appreciated that term used illustrates and exemplary and nonrestrictive term.Spirit or the essence of invention is not departed from because the present invention can specifically implement in a variety of forms, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in claim of enclosing, therefore fall into whole change in claim or its equivalent scope and remodeling and all should be claim of enclosing and contained.
Claims (15)
1. a battery charger, is characterized in that, comprising:
Master power switch;
Multiple feedback control circuit, each feedback control circuit receives corresponding reference signal, controling parameters feedback signal and ramp signal, based on corresponding reference signal, controling parameters feedback signal and ramp signal, each feedback control circuit exports corresponding feedback control signal;
Long circuit time fixing, exports fixing duration signal; And
Logical circuit, receives multiple feedback control signal and fixing duration signal, based on multiple feedback control signal and fixing duration signal, at output output switch control signal to control the operation of master power switch.
2. battery charger as claimed in claim 1, it is characterized in that, each feedback control circuit comprises:
Feedback circuit, there is first input end, the second input and output, described first input end receives corresponding controling parameters feedback signal, second input receives ramp signal, based on controling parameters feedback signal and ramp signal, described feedback circuit is at output output feedack operation result; And
Comparator, there is first input end, the second input and output, described first input end is coupled to feedback circuit and receives feedback op result, described second input receives corresponding reference signal, based on corresponding reference signal and feedback op result, described comparator exports corresponding feedback control signal at output.
3. battery charger as claimed in claim 1, it is characterized in that, described feedback control circuit also receives error correction signal, based on reference signal, error correction signal, controling parameters feedback signal and ramp signal, and described feedback control circuit output feedback ontrol signal.
4. battery charger as claimed in claim 3, it is characterized in that, each feedback control circuit comprises:
Feedback circuit, there is first input end, the second input and output, described first input end receives corresponding controling parameters feedback signal, second input receives ramp signal, based on controling parameters feedback signal and ramp signal, described feedback circuit is at output output feedack operation result;
Benchmark computing circuit, there is first input end, the second input and output, described first input end receives corresponding reference signal, described second input receives corresponding error correction signal, based on corresponding reference signal and corresponding error correction signal, described benchmark computing circuit is at output output reference operation result; And
Comparator, there is first input end, the second input and output, described first input end is coupled to feedback circuit and receives feedback op result, described second input is coupled to benchmark computing circuit and receives benchmark operation result, based on corresponding feedback op result and benchmark operation result, described comparator exports corresponding feedback control signal at output.
5. the battery charger as described in any one of claim 2 or 4, wherein said logical circuit comprises:
OR circuit, has multiple input and output, and described multiple input is coupled to the feedback control signal that multiple feedback control circuit receives the output of each feedback control circuit respectively, and based on multiple feedback control signal, described output exports reset signal; And
Rest-set flip-flop, there is set end, reset terminal and output, when described set end is coupled to fixing, long circuit receives fixing duration signal, the output that described reset terminal is coupled to OR circuit receives reset signal, based on fixing duration signal and reset signal, described output output switch control signal.
6. the battery charger as described in any one of claim 2 or 4, wherein said logical circuit comprises:
AND circuit, has multiple input and output, and described multiple input is coupled to the feedback control signal that multiple feedback control circuit receives the output of each feedback control circuit respectively, and based on multiple feedback control signal, described output exports asserts signal; And
Rest-set flip-flop, there is set end, reset terminal and output, the output that described set end is coupled to AND circuit receives asserts signal, when described reset terminal is coupled to fixing, long circuit receives fixing duration signal, based on fixing duration signal and asserts signal, described output output switch control signal.
7. a battery charger, is characterized in that, comprising:
Master power switch;
Output voltage feedback control circuit, comprise the first comparator, the first input end of described first comparator receives the superposed signal of output voltage feedback signal and ramp signal, second input receives output voltage reference signal, based on output voltage reference signal, ramp signal and output voltage feedback signal, described first comparator exports output voltage feedback control signal at output;
Output current feedback control circuit, comprise the second comparator, the first input end of described second comparator receives the superposed signal of output current feedback signal and ramp signal, second input receives output current reference signal, based on output current reference signal, ramp signal and output current feedback signal, described second comparator exports output current feedback control signal at output;
Input voltage feedback control circuit, comprise the 3rd comparator, the first input end of described 3rd comparator receives the difference signal of input voltage feedback signal and ramp signal, second input receives input voltage reference signal, based on input voltage reference signal, ramp signal and input voltage feedback signal, described 3rd comparator is in output output-input voltage feedback control signal;
Input current feedback control circuit, comprise the 4th comparator, the first input end of described 4th comparator receives the superposed signal of input current feedback signal and ramp signal, second input receives input current reference signal, based on input current reference signal, ramp signal and input current feedback signal, described 4th comparator exports input current feedback control signal at output;
Long circuit time fixing, exports fixing duration signal, described fixing duration signal each switch periods from master power switch turns off after one section of default fixing duration output pulse signal; And
Logical circuit, receive output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, based on output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, control the operation of master power switch at output output switch control signal.
8. battery charger as claimed in claim 7, wherein said logical circuit comprises:
OR circuit, there is four inputs and output, described four inputs are coupled to output voltage feedback control circuit respectively, output current feedback control circuit, input voltage feedback control circuit and input current feedback control circuit receive output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal and input current feedback control signal, based on output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal and input current feedback control signal, described output exports reset signal, and
Rest-set flip-flop, there is set end, reset terminal and output, when described set end is coupled to fixing, long circuit receives fixing duration signal, the output that described reset terminal is coupled to OR circuit receives reset signal, based on fixing duration signal and reset signal, described output output switch control signal.
9. a battery charger, is characterized in that, comprising:
Master power switch;
Output voltage feedback control circuit, comprise the first comparator, the first input end of described first comparator receives the difference signal of output voltage feedback signal and ramp signal, second input receives output voltage reference signal, based on output voltage reference signal, ramp signal and output voltage feedback signal, described first comparator exports output voltage feedback control signal at output;
Output current feedback control circuit, comprise the second comparator, the first input end of described second comparator receives the difference signal of output current feedback signal and ramp signal, second input receives output current reference signal, based on output current reference signal, ramp signal and output current feedback signal, described second comparator exports output current feedback control signal at output;
Input voltage feedback control circuit, comprise the 3rd comparator, the first input end of described 3rd comparator receives the superposed signal of input voltage feedback signal and ramp signal, second input receives input voltage reference signal, based on input voltage reference signal, ramp signal and input voltage feedback signal, described 3rd comparator is in output output-input voltage feedback control signal;
Input current feedback control circuit, comprise the 4th comparator, the first input end of described 4th comparator receives the difference signal of input current feedback signal and ramp signal, second input receives input current reference signal, based on input current reference signal, ramp signal and input current feedback signal, described 4th comparator exports input current feedback control signal at output;
Long circuit time fixing, exports fixing duration signal, described fixing duration signal each switch periods from master power switch conducting after one section of default fixing duration output pulse signal; And
Logical circuit, receive output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, based on output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal, input current feedback control signal and fixing duration signal, control the operation of master power switch at output output switch control signal.
10. battery charger as claimed in claim 9, wherein said logical circuit comprises:
AND circuit, there is four inputs and output, described four inputs are coupled to output voltage feedback control circuit respectively, output current feedback control circuit, input voltage feedback control circuit and input current feedback control circuit receive output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal and input current feedback control signal, based on output voltage feedback control signal, output current feedback control signal, input voltage feedback control signal and input current feedback control signal, described output exports asserts signal, and
Rest-set flip-flop, there is set end, reset terminal and output, the output that described set end is coupled to AND circuit receives asserts signal, when described reset terminal is coupled to fixing, long circuit receives fixing duration signal, based on fixing duration signal and asserts signal, described output output switch control signal.
The control method of 11. 1 kinds of battery chargers, described battery charger comprises master power switch, comprising:
Adopt multiple feedback control circuit to receive multiple reference signal, multiple controling parameters feedback signal and ramp signal, and each feedback control circuit generate corresponding feedback control signal based on corresponding reference signal, corresponding controling parameters feedback signal and ramp signal;
When adopting fixing, long circuit exports fixing duration signal; And
Select the break-make of master power switch described in multiple feedback control signal feedback control signal and fixing duration signal co-controlling.
The control method of 12. battery chargers as claimed in claim 11, wherein, each feedback control circuit, based on corresponding reference signal, corresponding controling parameters feedback signal and ramp signal, generates corresponding feedback control signal and comprises:
Computing is carried out to corresponding controling parameters feedback signal and ramp signal and obtains feedback op result; And
Feedback op result is generated corresponding feedback control signal compared with corresponding reference signal.
The control method of 13. battery chargers as claimed in claim 11, wherein, described fixing duration signal comprises fixing duration Continuity signal.
The control method of 14. battery chargers as claimed in claim 11, wherein, described fixing duration signal comprises fixing duration cut-off signals.
The control method of 15. battery chargers as described in any one of claim 11 ~ 14, wherein, adopt error correction signal to carry out error correction to corresponding reference signal, described error correction comprises and corresponding error correction signal is superimposed to corresponding reference signal or deducts corresponding error correction signal from corresponding reference signal.
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| TW105102235A TWI622204B (en) | 2015-02-02 | 2016-01-25 | Charging circuit and the method thereof |
| US15/011,380 US10348111B2 (en) | 2015-02-02 | 2016-01-29 | Charging circuit and the method thereof |
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| CN105610216B (en) * | 2015-12-29 | 2018-05-22 | 成都芯源系统有限公司 | High-capacity battery charging circuit and control method thereof |
| CN105553007B (en) * | 2015-12-29 | 2018-05-22 | 成都芯源系统有限公司 | Buck-boost battery charging circuit and control method thereof |
| CN109088449A (en) * | 2018-06-28 | 2018-12-25 | 杭州茂力半导体技术有限公司 | Battery charger and its control circuit and control method |
| CN109088449B (en) * | 2018-06-28 | 2020-10-13 | 杭州茂力半导体技术有限公司 | Battery charging circuit and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201630248A (en) | 2016-08-16 |
| US20160226285A1 (en) | 2016-08-04 |
| TWI622204B (en) | 2018-04-21 |
| CN104638723B (en) | 2017-02-22 |
| US10348111B2 (en) | 2019-07-09 |
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